BPG致力于知识的发现和传播
Total Visits of This Article
2021 | 总访问次数
排名 国家/地区 数量 占比
1 China 171 58%
2 United States 55 18.6%
3 Germany 46 15.6%
4 Hong Kong 4 1.4%
5 Netherlands 4 1.4%
6 Oman 2 0.7%
7 Canada 2 0.7%
8 Japan 2 0.7%
9 Singapore 2 0.7%
10 Sweden 2 0.7%
11 Ukraine 2 0.7%
12 United Kingdom 2 0.7%
13 Poland 1 0.3%